package main
import "fmt"
func main(){
	var he,cha int
	
	fmt.Printf("4 + 6 = %d\n",sum(4, 6))
	
	he, cha = jisuan(4, 6)
	fmt.Printf("4 + 6 = %d\t4 - 6 = %d\n", he, cha)
	
	_, cha = jisuan(9, 6)
	fmt.Printf("4 + 6 = %d\t9 - 6 = %d\n", he, cha)
	
}

func sum(a int, b int)(int){
	return a + b
}

func jisuan(a int, b int)(int,int){
	return a + b, a - b
}
